package com.atguigu.interview.study.thread;


import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

class MyResource
{
    private volatile boolean FLAG = true; // 默认开启，进行生产+消费
    private AtomicInteger atomicInteger = new AtomicInteger();

    BlockingQueue<String> blockingQueue = null;
    public MyResource(BlockingQueue<String> blockingQueue) {
        this.blockingQueue = blockingQueue;
        System.out.println(blockingQueue.getClass().getName());
    }

    public void myProd() throws Exception {
        String data = null;
        boolean retValue;
        while (FLAG) {
            data = atomicInteger.incrementAndGet() + "";
            // 指定元素插入队列，并等待对应时间
            retValue = blockingQueue.offer(data,2L,TimeUnit.SECONDS);
            if (retValue) {
                System.out.println(Thread.currentThread().getName()+"\t 插入队列" + data + "成功");
            } else {
                System.out.println(Thread.currentThread().getName() + "插入队列" + data + "失败");
            }
            TimeUnit.SECONDS.sleep(1);
        }
        System.out.println(Thread.currentThread().getName() + "\t 老大叫停了，表示FLAG=false,生产动作结束");
    }

    public void myConsumer() throws Exception {
        String result = null;
        while(FLAG) {
            
            result = blockingQueue.poll(2L, TimeUnit.SECONDS);
            if (null == result && result.equalsIgnoreCase("")) {
                FLAG = false;
                System.out.println(Thread.currentThread().getName() + "\t超过2秒没有取到蛋糕，消费退出");
                System.out.println();
                System.out.println();
                return;
            }
            System.out.println(Thread.currentThread().getName() + "\t 消费队列蛋糕" + result + "成功");
        }
    }

    public void stop () {
        this.FLAG = false;
    }
}
/**
 * @author gcq
 * @Create 2020-11-26
 *      volatile/CAS/atomicInteger/BlockQueue/线程交互/原子引用
 */
public class ProdConsumer_BlockQueueDemo {
    public static void main(String[] args) {
        MyResource myResource = new MyResource(new ArrayBlockingQueue<String>(10));
        new Thread(() -> {
            System.out.println(Thread.currentThread().getName() + "\t 生产者线程启动");
            try {
                myResource.myProd();
            } catch (Exception e) {
                e.printStackTrace();
            }
        },"Prod").start();

        new Thread(() -> {
            System.out.println(Thread.currentThread().getName() + "\t 消费者线程启动");
            System.out.println();
            System.out.println();
            try {
                myResource.myConsumer();
            } catch (Exception e) {
                e.printStackTrace();
            }
        },"Consumer").start();

        // 暂停一会线程
        try { TimeUnit.SECONDS.sleep(5); } catch (InterruptedException e) { e.printStackTrace(); }
        System.out.println();
        System.out.println();
        System.out.println();
        System.out.println("5秒钟时间到，大老板main线程叫停活动结束");

        myResource.stop();
    }
}